Missing Authorization vulnerability in PickPlugins Testimonial Slider testimonial allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Testimonial Slider: from n/a through <= 2.0.15.

The Testimonial Slider plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'testimonialcategory' shortcode in all versions up to, and including, 1.3.2 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The Testimonial Slider WordPress plugin before 2.3.8 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfilteredhtml capability is disallowed (for example in multisite setup)